Service Procedure For EATC Systems

1. Latch the gearshift selector lever in "P" (Park) for automatic transmission equipped vehicles, or shift into "N" (Neutral) for manual transmission equipped vehicles. Fully set the parking brake and place wood blocks (4" x 4" size, or larger), at the front and rear of each tire. Cover front and rear seats.
WARNING: UNEXPECTED AND POSSIBLY SUDDEN VEHICLE MOVEMENT MAY OCCUR IF THESE PRECAUTIONS ARE NOT TAKEN.

2. Check ALL A/C system condensate drains for obstructions. Any obstructions must be eliminated before proceeding.






3. With vehicle engine turned off, disconnect the electrical connector at the A/C clutch. If electrical connector is hard to reach, disconnect pressure switch at suction/accumulator.

NOTE: It will be necessary to operate vehicle engine during this procedure to provide a source of vacuum required by some A/C control systems and to prevent battery drain.

WARNING: ONLY OPERATE THE ENGINE IN A WELLVENTILATED AREA TO AVOID CARBON MONOXIDE POISONING.
4. Carefully read the following cautions for the Disinfectant Part A, Disinfectant Part B, and their mixture.

Keep out of reach of children.

WARNING - HAZARDS TO HUMANS:
Causes eye irritation. Wear safety goggles during mixing and application to avoid contact with eyes. Can cause respiratory irritation. Wear a NIOSH approved acid gas/organic vapor respirator with dust/mist pre-filter according to instructions to avoid inhalation during application. Disinfectant may bleach clothing. Wash thoroughly with soap and water after handling.

FIRST AID: If in eyes, flush eyes with plenty of water. If inhaled, remove to fresh air. For both conditions, seek medical attention if irritation persists.
STORAGE AND DISPOSAL: Store in cool place in original containers. Always replace caps. Keep upright. Wash empty containers thoroughly and discard in a safe place. Do not reuse empty containers.

5. To prepare disinfectant for use, add all of the container labeled "Motorcraft A/C System Disinfectant Part B" to the larger container labeled "A/C System Disinfectant Part A". Replace cap and gently turn container over once or twice to mix completely. Pour the disinfectant mixture into the fluid container of the Dirkes Industries Spray Unit, Model No. 3366 or Rotunda Model #134-00055. Set the air supply regulator between 40 and 45 psi.



6. Start engine. Set A/C system control to AUTO position and adjust temperature setting to 60~F. The airflow should be from panel register openings.



Turn ignition off.
Spray disinfectant into the A/C system through each defroster, side window demister, panel register, and floor duct opening for 5 to 1 0 seconds per opening.



7. Restart engine and adjust temperature setting to 90~F. The airflow should be from floor duct outlets. Turn ignition off. Spray as in Step 6.



8. Restart engine and set control for DEFROST position. Adjust temperature setting until discharge air from defroster outlet feels slightly cooler. Turn ignition off. Spray as in Step 6.



9. With A/C system still set for defrost airflow, spray the exposed surface of the outside/recirculating door for 5 to 10 seconds.



10. Restart engine. Set A/C system control to AUTO position and adjust temperature setting to 60~F. The airflow should be from panel register openings with recirculating inside air. Spray the remainder of the disinfectant into the recirculate air inlet. Point disinfectant spray toward center of blower wheel if visible; otherwise, direct spray toward center of airflow path. All of the disinfectant must be used for maximum effectiveness.
CAUTION: Check the drain frequently to make sure the disinfectant is not collecting inside the evaporator case.
IMPORTANT!

Spray liquid untilfluid container is completely empty. After fluid container is empty, raise fluid hose to maintain a solid column of liquid. Continue to raise fluid hose forcing the fluid through the spray nozzle. This will use all of the material and only a minimum of residue will remain in the fluid hose.

NOTE: This minimizes cleaning time for the equipment.
11. While the vehicle's A/C system is soaking, clean the spray unit with tap water to remove any residual disinfectant from the spray fluid container and hoses. Wear safety goggles when cleaning the spray unit.

To Clean: With spray unit off, pour 1 to 2 oz. tap water into fluid container. Cover hole in cap with thumb and shake container. Turn spray unit on and spray through nozzle to flush system.

The easiest and best way to have a good working spray unit is to keep it clean.

Do not take the spray nozzle apart unless absolutely necessary. If clogged, follow the directions included for disassembly.
12. With spray unit off, fill the spray unit's fluid container with tap water. Set the air supply regulator between 40 and 45 psi.



13. Start engine. Set A/C system control to AUTO position with temperature setting at 60~F. Turn ignition off. Spray mold inhibitor into each defroster, side window demister, panel register, and floor duct opening for 1 to 5 seconds per opening.



14. Restart engine and adjust temperature setting to 90~F. The airflow should be from floor duct outlets. Turn ignition off. Spray as in Step 13.



15. Restart engine and set control for DEFROST position. Adjust temperature setting until discharge air from defroster outlet feels slightly cooler. Turn ignition off. Spray as in Step 13.



16. With the A/C system still set for defrost airflow, spray the exposed surface of the outside/recirculating door for 1 to 5 seconds.



17. Restart engine. Set A/C system control to AUTO position and adjust temperature setting to 60~F. Spray the remainder of the rinse water into the recirculate air inlet. Spray the rinse water toward center of blower wheel if visible; otherwise, direct spray toward center of airflow path. All of the water must be used for a thorough rinse.
18. With engine off, reconnect the electrical connector at the A/C clutch or reconnect pressure switch at the suction/accumulator.

19. Dry the spray unit by continuing to spray air.